ci: Add CI workflow

.github/workflows/create-release.yaml

@@ -0,0 +1,34 @@
+name: Build and release
+on: workflow_dispatch
+
+jobs:
+  build-and-release:
+    name: Build and release
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3.5.2
+
+      - name: Setup Docker
+        uses: docker/setup-buildx-action@2.5.0
+
+      - name: Build toolchain
+        uses: docker/build-push-action@4.0.0
+        with:
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          context: ./toolchain/
+          load: true
+          tags: rg35xx-toolchain-new:latest
+
+      - name: Build project
+        uses: addnab/docker-run-action@v3.0.0
+        with:
+          image: rg35xx-toolchain-new:latest
+          options: -v ${{github.workspace}}:/root/workspace
+          run: make all
+
+      - name: Create release
+        run: |
+          ls -a ./releases/
+          echo "TODO"